Guides
Comparisons and explainers for backup-power planning. WattLong does not publish hands-on reviews: we don't bench-test hardware, and we won't pretend to. Every comparison below is calculated from the manufacturers' published specifications using the formula on our how we calculate page — the same math our calculators run, with the assumptions printed where you can argue with them.
Three ~1 kWh-class LFP stations, one spec table, and calculated runtimes for a fridge, a CPAP, and a laptop.
Best power stations for a fridge during an outage →All 30 models in our database ranked by one thing: calculated fridge runtime. Assumptions stated, ties and trade-offs named.
Why the runtime on the box won't match your outage →Usable energy vs nameplate watt-hours, the 0.85 inverter factor, boost-mode marketing, and fridge duty cycles — the four gaps between advertised and actual runtime.
How we calculate →The formulas, the data rules, and the grade on every assumption (CONFIRMED / REPORTED / INFERRED).
Data as of Oct 19, 2026. Specifications come from manufacturer product pages and manuals (or dealer pages reproducing the manufacturer's spec sheet, graded REPORTED). Manufacturers revise products; if a figure here no longer matches the manufacturer's page, tell us via the contact page and it will be fixed and logged.
WattLong is reader-supported. Some links on this site are affiliate links: if you buy through them, we may earn a commission at no extra cost to you. See our affiliate disclosure. All results are estimates — verify with the manufacturer and a licensed electrician before relying on them.